Student Health Services
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Hot Tips for Summer Sun Worshippers
Tired of a long winter indoors? Before you break outside to the beach and experience your first burn of the season, here are some things you should keep in mind - what you do today in the sun can have long-term effects on your physical health later in life. Prematurely aging skin, skin cancer, cataracts, and herpes simplex I (cold sores) are all by-products of sun-overexposure. Take note: to have fun in the sun - whether sport or pleasure - play it safe using preventive sunscreen measures to block the damaging effects of ultraviolet (UV) radiation.
Natural sunlight emits wavelengths that become harmful once they reach the surface of the earth as UV light. UV radiation is responsible for tanning and associated skin damage. UV light is composed of several different types: UVA radiation is the predominant type reaching the earth's surface. Most modern tanning facilities use UVA rays which can produce redness of the skin and resulting skin damage. UVB rays are fully absorbed by the skin; thus they are responsible for many damaging effects attributed to skin exposure, including sunburn.
The ozone layer which normally absorbs harmful ultraviolet rays is depleting; its protection is diminished, thus allowing these harmful rays to penetrate the earth's surface and affect sun bathers.
It takes just a little common sense to reap the rewards of a sunny day without jeopardizing your health or causing unnecessary discomfort. The following information provides a primer of what to look for.
Sunglasses need to filter out UVA and UVB rays. While most sunglasses provide comfort in the sun by blocking visible light rays, nearly half don't provide adequate ultraviolet or blue light (which is higher in frequency than ultraviolet light) protection. Lens tint provides visible light ray protection, but it is the chemicals that lenses are treated with that provide blocking power. Therefore, even darkly tinted lenses can still allow damaging radiation to enter the eye. Conversely, clear lenses can be treated to block ultraviolet rays almost 100%.
Always look for glasses that block as much ultraviolet radiation as possible and at least 75% of visible light. Labeling for ultraviolet and visible light blocking is voluntary for non-prescription sunglasses. With no government standards, consumers should look for glasses that at least meet the standards of the American National Standard Institute (ANSI). Glasses that conform to ANSI standards have "Z-80.3" printed on the frame. The American Optometric Association (AOA) has set an even higher standard of safety than ANSI, specifying that a minimum 99% of both UVA and UVB rays be filtered out. Their seal of approval appears on only a couple of frame brands. At the very least, sunglasses should provide a label with a specific breakdown of the rays they filter out and how much.
SPF Guidelines for Sun Catchers
- Skin type I (always burns easily, never tans) Recommended SPF of at least 15
- Skin type II (always burns easily, tans minimally) Recommended SPF of at least 15
- Skin type III (burns moderately, tans gradually) Recommended SPF of at least 15
- Skin Type IV (burns minimally, always tans well) Recommended SPF 6-10
- Skin Type V (rarely burns, tans profusely) Recommended SPF 4-6
- Skin Type VI (never burns, deeply pigmented) Doesn't routinely require an SPF
*SPF of 15 or higher should be used by patients with a history of skin cancer or photosensitivity disease.
Never underestimate the therapeutic properties of this liquid that we take for granted. Whether you are gardening, sunbathing, or running, always keep yourself well-hydrated with water. Don't wait until thirst sets in to have a glass. The minimum a person should have on any given day is eight 8 ounce glasses, and in times of heavy exercise or sun exposure that number should be increased to meet your needs.